mirror of
https://github.com/classilla/tenfourfox.git
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151 lines
5.4 KiB
C++
151 lines
5.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* representation of a SMIL-animatable mapped attribute on an element */
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#include "nsSMILMappedAttribute.h"
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#include "nsContentUtils.h"
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#include "nsError.h" // For NS_PROPTABLE_PROP_OVERWRITTEN
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#include "nsSMILValue.h"
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#include "nsSMILCSSValueType.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsCSSProps.h"
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#include "mozilla/dom/Element.h"
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// Callback function, for freeing string buffers stored in property table
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static void
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ReleaseStringBufferPropertyValue(void* aObject, /* unused */
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nsIAtom* aPropertyName, /* unused */
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void* aPropertyValue,
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void* aData /* unused */)
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{
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nsStringBuffer* buf = static_cast<nsStringBuffer*>(aPropertyValue);
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buf->Release();
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}
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nsresult
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nsSMILMappedAttribute::ValueFromString(const nsAString& aStr,
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const mozilla::dom::SVGAnimationElement* aSrcElement,
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nsSMILValue& aValue,
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bool& aPreventCachingOfSandwich) const
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{
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NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
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nsSMILCSSValueType::ValueFromString(mPropID, mElement, aStr, aValue,
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&aPreventCachingOfSandwich);
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return aValue.IsNull() ? NS_ERROR_FAILURE : NS_OK;
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}
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nsSMILValue
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nsSMILMappedAttribute::GetBaseValue() const
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{
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nsAutoString baseStringValue;
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RefPtr<nsIAtom> attrName = GetAttrNameAtom();
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bool success = mElement->GetAttr(kNameSpaceID_None, attrName,
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baseStringValue);
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nsSMILValue baseValue;
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if (success) {
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// For base values, we don't need to worry whether the value returned is
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// context-sensitive or not since the compositor will take care of comparing
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// the returned (computed) base value and its cached value and determining
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// if an update is required or not.
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nsSMILCSSValueType::ValueFromString(mPropID, mElement,
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baseStringValue, baseValue, nullptr);
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} else {
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// Attribute is unset -- use computed value.
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// FIRST: Temporarily clear animated value, to make sure it doesn't pollute
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// the computed value. (We want base value, _without_ animations applied.)
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void* buf = mElement->UnsetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
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attrName, nullptr);
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FlushChangesToTargetAttr();
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// SECOND: we use nsSMILCSSProperty::GetBaseValue to look up the property's
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// computed value. NOTE: This call will temporarily clear the SMIL
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// override-style for the corresponding CSS property on our target element.
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// This prevents any animations that target the CSS property from affecting
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// animations that target the mapped attribute.
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baseValue = nsSMILCSSProperty::GetBaseValue();
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// FINALLY: If we originally had an animated value set, then set it again.
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if (buf) {
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mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName, buf,
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ReleaseStringBufferPropertyValue);
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FlushChangesToTargetAttr();
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}
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}
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return baseValue;
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}
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nsresult
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nsSMILMappedAttribute::SetAnimValue(const nsSMILValue& aValue)
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{
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NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID), NS_ERROR_FAILURE);
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// Convert nsSMILValue to string
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nsAutoString valStr;
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if (!nsSMILCSSValueType::ValueToString(aValue, valStr)) {
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NS_WARNING("Failed to convert nsSMILValue for mapped attr into a string");
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return NS_ERROR_FAILURE;
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}
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RefPtr<nsIAtom> attrName = GetAttrNameAtom();
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nsStringBuffer* oldValStrBuf = static_cast<nsStringBuffer*>
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(mElement->GetProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName));
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if (oldValStrBuf) {
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nsString oldValStr;
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nsContentUtils::PopulateStringFromStringBuffer(oldValStrBuf, oldValStr);
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if (valStr.Equals(oldValStr)) {
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// New animated value is the same as the old; nothing to do.
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return NS_OK;
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}
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}
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// Set the string as this mapped attribute's animated value.
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nsStringBuffer* valStrBuf =
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nsCSSValue::BufferFromString(nsString(valStr)).take();
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nsresult rv = mElement->SetProperty(SMIL_MAPPED_ATTR_ANIMVAL,
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attrName, valStrBuf,
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ReleaseStringBufferPropertyValue);
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if (rv == NS_PROPTABLE_PROP_OVERWRITTEN) {
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rv = NS_OK;
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}
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FlushChangesToTargetAttr();
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return rv;
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}
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void
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nsSMILMappedAttribute::ClearAnimValue()
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{
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RefPtr<nsIAtom> attrName = GetAttrNameAtom();
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mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL, attrName);
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FlushChangesToTargetAttr();
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}
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void
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nsSMILMappedAttribute::FlushChangesToTargetAttr() const
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{
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// Clear animated content-style-rule
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mElement->DeleteProperty(SMIL_MAPPED_ATTR_ANIMVAL,
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SMIL_MAPPED_ATTR_STYLERULE_ATOM);
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nsIDocument* doc = mElement->GetCurrentDoc();
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// Request animation restyle
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if (doc) {
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nsIPresShell* shell = doc->GetShell();
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if (shell) {
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shell->RestyleForAnimation(mElement, eRestyle_Self);
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}
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}
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}
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already_AddRefed<nsIAtom>
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nsSMILMappedAttribute::GetAttrNameAtom() const
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{
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return do_GetAtom(nsCSSProps::GetStringValue(mPropID));
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}
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